/*
 * @(#)FuturePropertyChangeListener.java	1.0 Apr 27, 2008
 *
 *	The MIT License
 *
 *	Copyright (c) 2008 Malachi de AElfweald <malachid@gmail.com>
 *
 *	Permission is hereby granted, free of charge, to any person obtaining a copy
 *	of this software and associated documentation files (the "Software"), to deal
 *	in the Software without restriction, including without limitation the rights
 *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the Software is
 *	furnished to do so, subject to the following conditions:
 *
 *	The above copyright notice and this permission notice shall be included in
 *	all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *	THE SOFTWARE.
 */
package org.eoti.swing.event;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import java.util.concurrent.*;

public class FuturePropertyChangeListener
implements PropertyChangeListener
{
	protected PropertyChangeListener listener;
	protected FutureTask<PropertyChangeEvent> task;
    protected ExecutorService executor;
    protected CopyOnWriteArraySet<String> ignoreSet;
	protected boolean disableAll = false;

	public FuturePropertyChangeListener(PropertyChangeListener listener)
	{
		this.listener = listener;
		executor = Executors.newSingleThreadExecutor();
		ignoreSet = new CopyOnWriteArraySet<String>();
	}

	public void propertyChange(final PropertyChangeEvent event)
	{
		if(!isEnabled(event.getPropertyName()))
			return;

		task = new FutureTask<PropertyChangeEvent>(
			new Callable<PropertyChangeEvent>()
			{
				public PropertyChangeEvent call()
				{
					listener.propertyChange( event );
					return event;
				}
			}
		);
		executor.execute(task);
	}

	public void enable(String propertyName){ignoreSet.remove(propertyName);}
	public boolean isEnabled(String propertyName){return !ignoreSet.contains(propertyName);}
	public void disable(String propertyName){ignoreSet.add(propertyName);}
	public void disableAll(){disableAll = true;}
	public void enableAll(){disableAll = false;}
    public boolean areAllDisabled(){return disableAll;}
	public boolean areAllEnabled(){return ( (!disableAll) && ignoreSet.isEmpty() );}
}
